Vehicle-spring



(NoModeL) E. M. VAN VALKENBURG.

VEHICLE SPRING.

No. 418,092. Patented Dec. 24, 18819.

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witnesses gimve wfoz z l flfloznu a UNITED STATES PATENT OFFICE.

ELLIS M. VAN VALKENBURG, OF UNION GROVE, WISCONSIN.

VEHICLE-SPRING.

SPECIFICATION forming part of Letters Patent No. 418,092, dated December24, 1889. Application filed September 16, 1889. Serial No. 324,046. (Nomodel.

ers skilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters ofreference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of this invention, and isan elevation of a bolster and false bolster with the springs. Fig. 2 isa top view of the same. Fig. 3 is the same as Fig. 1, and shows theposition of the springs When depressed by a load.

This invention relates to vehicle-springs; and it consists in the novelconstruction and combination of parts, as hereinafter described, andpointed out in the claims.

This spring is constructed of steel; and it consists of the leaves E E,comprising a double spring having the central straight parallel upperbearings B and the curved end bearings C and D. The leaves comprisingthe spring are depressed one above other, and are centrally boltedtogether at g. Notches or recesses d are formed on the lateral edges ofthe double spring at each end of the central bearings to receive,respectively, the loop of a clevis or shackle h, pivoted to the side ofa false bolster or spring- A bar G, whereby the latter is secured to thespring and supported thereby. The ends H of the upper leaf are curveddownward and upward from the clevis attachments to form short springs,upon which the ends of springbar rest, respectively, when the spring isunder pressure of a load, the central part being depressed at the sametime in the form of a bow, whose concavity rests upon the bolster A, asshown in Fig. 3. The ends lot the lower leaf E are curved downward andoutward from the clevis attachments in the opposite direction to theends of the upper leaf, and rest constantly upon the bolster A, asshown.

In its normal position, when not subject to pressure, the central parts13 of the spring are parallel with and bear evenly against theundersurface of the spring-bar or false bolster, while the curved ends H ofthe upper leaf remain free from contact with the spring-bar, the latterbeing supported upon the bolster by the central bearings l3 and thecurved ends I of the lower leaf. The ends of the spring-bar are slottedVertically att' to receive the adjacent edges, respectively, of a stakeor upright B at each end of the bolster, whereby the said bar isrendered vertically adjustable. A plate S, having an elongated lateralslot m, is vertically and longitudinally adjusted in the slot '5 at eachend of the spring-bar by means of transverse bolts We, introducedthrough the bar and the slots of the adjustable plates. The ends of thebolts are threaded to engage a nut or burr '1', whereby the plates S maybe horizontally adjusted against the adjacent edge of the stakes toprovide for the varying space between the same on different vehicles.This adjustment is readily effected by loosening the burr of the boltsto adjust the plates backward or forward, as occasion may require, andtightening the burrs to secure the parts in position.

Metallic plates k are provided at those points of the bolster andspring-bar which come in contact with the spring to take the wear of thelatter.

What I claim as new, and desire to secure by Letters Patent, is

1. An elastic spring consisting of upper and lower leaves centrallybolted together and to the lower main bolster at the downward-bowedportion of said spring, and movably secured at each end to an adjustablefalse bolster by means of clips or olevises spring having its endscurved in opposite di- In testimony whereof Iaffix my signature inrections of the bolster, and a Vertica1lym0v presence of two Witnesses.

able spring-bar supported by the said spring and rendered laterallyadjustable by plates ELLIS VAN VALKENBURG' adj ustably secured in theslotted end of said \Vitnesses:

spring-bar, substantially as shown, and for D. WVORRALL,

the purpose described. JENNIE VVORRALL.

